Public bug reported:
Installing the package "haskell-stack" and then trying to run the ghci
interpreter results in
❯ stack ghci
Writing implicit global project config file to:
/home/janne/.stack/global-project/stack.yaml
Note: You can change the snapshot via the resolver field there.
Using latest snapshot resolver: lts-12.5
Downloaded lts-12.5 build plan.
AesonException "Error in
$.packages.cassava.constraints.flags['bytestring--lt-0_10_4']: Invalid flag
name: \"bytestring--lt-0_10_4\""
Per https://github.com/commercialhaskell/stackage/issues/2759 and
https://github.com/commercialhaskell/stack/issues/3345 this is apparently a bug
in stack which has subsequently been fixed. Indeed downloading and installing
the latest stack per the instructions at
https://docs.haskellstack.org/en/stable/README/ works.
More info as requested in bug reporting guidelines:
1)
❯ lsb_release -rd
Description: Ubuntu 18.04.1 LTS
Release: 18.04
2) haskell-stack version 1.5.1-1
** Affects: haskell-stack (Ubuntu)
Importance: Undecided
Status: New
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https://bugs.launchpad.net/bugs/1786197
Title:
stack 1.5.1 broken on 18.04 (AesonException)
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